This 3G/4G All Frequency Cellular Phone Jammer has 5 Powerful Antennae (4G LTE + 4G Wimax) that can block almost all kinds of 3G/4G frequencies. Besides jamming both the 4G LTE and 4G Wimax signals the simultaneously, this device also has the ability to block CDMA, GSM, 3G, DCS signals as well.